| /* |
| * Physical memory management API |
| * |
| * Copyright 2011 Red Hat, Inc. and/or its affiliates |
| * |
| * Authors: |
| * Avi Kivity <avi@redhat.com> |
| * |
| * This work is licensed under the terms of the GNU GPL, version 2. See |
| * the COPYING file in the top-level directory. |
| * |
| */ |
| |
| #ifndef MEMORY_H |
| #define MEMORY_H |
| |
| #ifndef CONFIG_USER_ONLY |
| |
| #define DIRTY_MEMORY_VGA 0 |
| #define DIRTY_MEMORY_CODE 1 |
| #define DIRTY_MEMORY_MIGRATION 2 |
| #define DIRTY_MEMORY_NUM 3 /* num of dirty bits */ |
| |
| #include "exec/cpu-common.h" |
| #ifndef CONFIG_USER_ONLY |
| #include "exec/hwaddr.h" |
| #endif |
| #include "exec/memattrs.h" |
| #include "qemu/queue.h" |
| #include "qemu/int128.h" |
| #include "qemu/notify.h" |
| #include "qom/object.h" |
| #include "qemu/rcu.h" |
| |
| #define RAM_ADDR_INVALID (~(ram_addr_t)0) |
| |
| #define MAX_PHYS_ADDR_SPACE_BITS 62 |
| #define MAX_PHYS_ADDR (((hwaddr)1 << MAX_PHYS_ADDR_SPACE_BITS) - 1) |
| |
| #define TYPE_MEMORY_REGION "qemu:memory-region" |
| #define MEMORY_REGION(obj) \ |
| OBJECT_CHECK(MemoryRegion, (obj), TYPE_MEMORY_REGION) |
| |
| typedef struct MemoryRegionOps MemoryRegionOps; |
| typedef struct MemoryRegionMmio MemoryRegionMmio; |
| |
| struct MemoryRegionMmio { |
| CPUReadMemoryFunc *read[3]; |
| CPUWriteMemoryFunc *write[3]; |
| }; |
| |
| typedef struct IOMMUTLBEntry IOMMUTLBEntry; |
| |
| /* See address_space_translate: bit 0 is read, bit 1 is write. */ |
| typedef enum { |
| IOMMU_NONE = 0, |
| IOMMU_RO = 1, |
| IOMMU_WO = 2, |
| IOMMU_RW = 3, |
| } IOMMUAccessFlags; |
| |
| struct IOMMUTLBEntry { |
| AddressSpace *target_as; |
| hwaddr iova; |
| hwaddr translated_addr; |
| hwaddr addr_mask; /* 0xfff = 4k translation */ |
| IOMMUAccessFlags perm; |
| }; |
| |
| /* New-style MMIO accessors can indicate that the transaction failed. |
| * A zero (MEMTX_OK) response means success; anything else is a failure |
| * of some kind. The memory subsystem will bitwise-OR together results |
| * if it is synthesizing an operation from multiple smaller accesses. |
| */ |
| #define MEMTX_OK 0 |
| #define MEMTX_ERROR (1U << 0) /* device returned an error */ |
| #define MEMTX_DECODE_ERROR (1U << 1) /* nothing at that address */ |
| typedef uint32_t MemTxResult; |
| |
| /* |
| * Memory region callbacks |
| */ |
| struct MemoryRegionOps { |
| /* Read from the memory region. @addr is relative to @mr; @size is |
| * in bytes. */ |
| uint64_t (*read)(void *opaque, |
| hwaddr addr, |
| unsigned size); |
| /* Write to the memory region. @addr is relative to @mr; @size is |
| * in bytes. */ |
| void (*write)(void *opaque, |
| hwaddr addr, |
| uint64_t data, |
| unsigned size); |
| |
| MemTxResult (*read_with_attrs)(void *opaque, |
| hwaddr addr, |
| uint64_t *data, |
| unsigned size, |
| MemTxAttrs attrs); |
| MemTxResult (*write_with_attrs)(void *opaque, |
| hwaddr addr, |
| uint64_t data, |
| unsigned size, |
| MemTxAttrs attrs); |
| |
| enum device_endian endianness; |
| /* Guest-visible constraints: */ |
| struct { |
| /* If nonzero, specify bounds on access sizes beyond which a machine |
| * check is thrown. |
| */ |
| unsigned min_access_size; |
| unsigned max_access_size; |
| /* If true, unaligned accesses are supported. Otherwise unaligned |
| * accesses throw machine checks. |
| */ |
| bool unaligned; |
| /* |
| * If present, and returns #false, the transaction is not accepted |
| * by the device (and results in machine dependent behaviour such |
| * as a machine check exception). |
| */ |
| bool (*accepts)(void *opaque, hwaddr addr, |
| unsigned size, bool is_write); |
| } valid; |
| /* Internal implementation constraints: */ |
| struct { |
| /* If nonzero, specifies the minimum size implemented. Smaller sizes |
| * will be rounded upwards and a partial result will be returned. |
| */ |
| unsigned min_access_size; |
| /* If nonzero, specifies the maximum size implemented. Larger sizes |
| * will be done as a series of accesses with smaller sizes. |
| */ |
| unsigned max_access_size; |
| /* If true, unaligned accesses are supported. Otherwise all accesses |
| * are converted to (possibly multiple) naturally aligned accesses. |
| */ |
| bool unaligned; |
| } impl; |
| |
| /* If .read and .write are not present, old_mmio may be used for |
| * backwards compatibility with old mmio registration |
| */ |
| const MemoryRegionMmio old_mmio; |
| }; |
| |
| typedef struct MemoryRegionIOMMUOps MemoryRegionIOMMUOps; |
| |
| struct MemoryRegionIOMMUOps { |
| /* Return a TLB entry that contains a given address. */ |
| IOMMUTLBEntry (*translate)(MemoryRegion *iommu, hwaddr addr, bool is_write); |
| /* Returns minimum supported page size */ |
| uint64_t (*get_min_page_size)(MemoryRegion *iommu); |
| /* Called when the first notifier is set */ |
| void (*notify_started)(MemoryRegion *iommu); |
| /* Called when the last notifier is removed */ |
| void (*notify_stopped)(MemoryRegion *iommu); |
| }; |
| |
| typedef struct CoalescedMemoryRange CoalescedMemoryRange; |
| typedef struct MemoryRegionIoeventfd MemoryRegionIoeventfd; |
| |
| struct MemoryRegion { |
| Object parent_obj; |
| |
| /* All fields are private - violators will be prosecuted */ |
| |
| /* The following fields should fit in a cache line */ |
| bool romd_mode; |
| bool ram; |
| bool subpage; |
| bool readonly; /* For RAM regions */ |
| bool rom_device; |
| bool flush_coalesced_mmio; |
| bool global_locking; |
| uint8_t dirty_log_mask; |
| RAMBlock *ram_block; |
| Object *owner; |
| const MemoryRegionIOMMUOps *iommu_ops; |
| |
| const MemoryRegionOps *ops; |
| void *opaque; |
| MemoryRegion *container; |
| Int128 size; |
| hwaddr addr; |
| void (*destructor)(MemoryRegion *mr); |
| uint64_t align; |
| bool terminates; |
| bool skip_dump; |
| bool enabled; |
| bool warning_printed; /* For reservations */ |
| uint8_t vga_logging_count; |
| MemoryRegion *alias; |
| hwaddr alias_offset; |
| int32_t priority; |
| QTAILQ_HEAD(subregions, MemoryRegion) subregions; |
| QTAILQ_ENTRY(MemoryRegion) subregions_link; |
| QTAILQ_HEAD(coalesced_ranges, CoalescedMemoryRange) coalesced; |
| const char *name; |
| unsigned ioeventfd_nb; |
| MemoryRegionIoeventfd *ioeventfds; |
| NotifierList iommu_notify; |
| }; |
| |
| /** |
| * MemoryListener: callbacks structure for updates to the physical memory map |
| * |
| * Allows a component to adjust to changes in the guest-visible memory map. |
| * Use with memory_listener_register() and memory_listener_unregister(). |
| */ |
| struct MemoryListener { |
| void (*begin)(MemoryListener *listener); |
| void (*commit)(MemoryListener *listener); |
| void (*region_add)(MemoryListener *listener, MemoryRegionSection *section); |
| void (*region_del)(MemoryListener *listener, MemoryRegionSection *section); |
| void (*region_nop)(MemoryListener *listener, MemoryRegionSection *section); |
| void (*log_start)(MemoryListener *listener, MemoryRegionSection *section, |
| int old, int new); |
| void (*log_stop)(MemoryListener *listener, MemoryRegionSection *section, |
| int old, int new); |
| void (*log_sync)(MemoryListener *listener, MemoryRegionSection *section); |
| void (*log_global_start)(MemoryListener *listener); |
| void (*log_global_stop)(MemoryListener *listener); |
| void (*eventfd_add)(MemoryListener *listener, MemoryRegionSection *section, |
| bool match_data, uint64_t data, EventNotifier *e); |
| void (*eventfd_del)(MemoryListener *listener, MemoryRegionSection *section, |
| bool match_data, uint64_t data, EventNotifier *e); |
| void (*coalesced_mmio_add)(MemoryListener *listener, MemoryRegionSection *section, |
| hwaddr addr, hwaddr len); |
| void (*coalesced_mmio_del)(MemoryListener *listener, MemoryRegionSection *section, |
| hwaddr addr, hwaddr len); |
| /* Lower = earlier (during add), later (during del) */ |
| unsigned priority; |
| AddressSpace *address_space_filter; |
| QTAILQ_ENTRY(MemoryListener) link; |
| }; |
| |
| /** |
| * AddressSpace: describes a mapping of addresses to #MemoryRegion objects |
| */ |
| struct AddressSpace { |
| /* All fields are private. */ |
| struct rcu_head rcu; |
| char *name; |
| MemoryRegion *root; |
| int ref_count; |
| bool malloced; |
| |
| /* Accessed via RCU. */ |
| struct FlatView *current_map; |
| |
| int ioeventfd_nb; |
| struct MemoryRegionIoeventfd *ioeventfds; |
| struct AddressSpaceDispatch *dispatch; |
| struct AddressSpaceDispatch *next_dispatch; |
| MemoryListener dispatch_listener; |
| |
| QTAILQ_ENTRY(AddressSpace) address_spaces_link; |
| }; |
| |
| /** |
| * MemoryRegionSection: describes a fragment of a #MemoryRegion |
| * |
| * @mr: the region, or %NULL if empty |
| * @address_space: the address space the region is mapped in |
| * @offset_within_region: the beginning of the section, relative to @mr's start |
| * @size: the size of the section; will not exceed @mr's boundaries |
| * @offset_within_address_space: the address of the first byte of the section |
| * relative to the region's address space |
| * @readonly: writes to this section are ignored |
| */ |
| struct MemoryRegionSection { |
| MemoryRegion *mr; |
| AddressSpace *address_space; |
| hwaddr offset_within_region; |
| Int128 size; |
| hwaddr offset_within_address_space; |
| bool readonly; |
| }; |
| |
| /** |
| * memory_region_init: Initialize a memory region |
| * |
| * The region typically acts as a container for other memory regions. Use |
| * memory_region_add_subregion() to add subregions. |
| * |
| * @mr: the #MemoryRegion to be initialized |
| * @owner: the object that tracks the region's reference count |
| * @name: used for debugging; not visible to the user or ABI |
| * @size: size of the region; any subregions beyond this size will be clipped |
| */ |
| void memory_region_init(MemoryRegion *mr, |
| struct Object *owner, |
| const char *name, |
| uint64_t size); |
| |
| /** |
| * memory_region_ref: Add 1 to a memory region's reference count |
| * |
| * Whenever memory regions are accessed outside the BQL, they need to be |
| * preserved against hot-unplug. MemoryRegions actually do not have their |
| * own reference count; they piggyback on a QOM object, their "owner". |
| * This function adds a reference to the owner. |
| * |
| * All MemoryRegions must have an owner if they can disappear, even if the |
| * device they belong to operates exclusively under the BQL. This is because |
| * the region could be returned at any time by memory_region_find, and this |
| * is usually under guest control. |
| * |
| * @mr: the #MemoryRegion |
| */ |
| void memory_region_ref(MemoryRegion *mr); |
| |
| /** |
| * memory_region_unref: Remove 1 to a memory region's reference count |
| * |
| * Whenever memory regions are accessed outside the BQL, they need to be |
| * preserved against hot-unplug. MemoryRegions actually do not have their |
| * own reference count; they piggyback on a QOM object, their "owner". |
| * This function removes a reference to the owner and possibly destroys it. |
| * |
| * @mr: the #MemoryRegion |
| */ |
| void memory_region_unref(MemoryRegion *mr); |
| |
| /** |
| * memory_region_init_io: Initialize an I/O memory region. |
| * |
| * Accesses into the region will cause the callbacks in @ops to be called. |
| * if @size is nonzero, subregions will be clipped to @size. |
| * |
| * @mr: the #MemoryRegion to be initialized. |
| * @owner: the object that tracks the region's reference count |
| * @ops: a structure containing read and write callbacks to be used when |
| * I/O is performed on the region. |
| * @opaque: passed to the read and write callbacks of the @ops structure. |
| * @name: used for debugging; not visible to the user or ABI |
| * @size: size of the region. |
| */ |
| void memory_region_init_io(MemoryRegion *mr, |
| struct Object *owner, |
| const MemoryRegionOps *ops, |
| void *opaque, |
| const char *name, |
| uint64_t size); |
| |
| /** |
| * memory_region_init_ram: Initialize RAM memory region. Accesses into the |
| * region will modify memory directly. |
| * |
| * @mr: the #MemoryRegion to be initialized. |
| * @owner: the object that tracks the region's reference count |
| * @name: the name of the region. |
| * @size: size of the region. |
| * @errp: pointer to Error*, to store an error if it happens. |
| */ |
| void memory_region_init_ram(MemoryRegion *mr, |
| struct Object *owner, |
| const char *name, |
| uint64_t size, |
| Error **errp); |
| |
| /** |
| * memory_region_init_resizeable_ram: Initialize memory region with resizeable |
| * RAM. Accesses into the region will |
| * modify memory directly. Only an initial |
| * portion of this RAM is actually used. |
| * The used size can change across reboots. |
| * |
| * @mr: the #MemoryRegion to be initialized. |
| * @owner: the object that tracks the region's reference count |
| * @name: the name of the region. |
| * @size: used size of the region. |
| * @max_size: max size of the region. |
| * @resized: callback to notify owner about used size change. |
| * @errp: pointer to Error*, to store an error if it happens. |
| */ |
| void memory_region_init_resizeable_ram(MemoryRegion *mr, |
| struct Object *owner, |
| const char *name, |
| uint64_t size, |
| uint64_t max_size, |
| void (*resized)(const char*, |
| uint64_t length, |
| void *host), |
| Error **errp); |
| #ifdef __linux__ |
| /** |
| * memory_region_init_ram_from_file: Initialize RAM memory region with a |
| * mmap-ed backend. |
| * |
| * @mr: the #MemoryRegion to be initialized. |
| * @owner: the object that tracks the region's reference count |
| * @name: the name of the region. |
| * @size: size of the region. |
| * @share: %true if memory must be mmaped with the MAP_SHARED flag |
| * @path: the path in which to allocate the RAM. |
| * @errp: pointer to Error*, to store an error if it happens. |
| */ |
| void memory_region_init_ram_from_file(MemoryRegion *mr, |
| struct Object *owner, |
| const char *name, |
| uint64_t size, |
| bool share, |
| const char *path, |
| Error **errp); |
| #endif |
| |
| /** |
| * memory_region_init_ram_ptr: Initialize RAM memory region from a |
| * user-provided pointer. Accesses into the |
| * region will modify memory directly. |
| * |
| * @mr: the #MemoryRegion to be initialized. |
| * @owner: the object that tracks the region's reference count |
| * @name: the name of the region. |
| * @size: size of the region. |
| * @ptr: memory to be mapped; must contain at least @size bytes. |
| */ |
| void memory_region_init_ram_ptr(MemoryRegion *mr, |
| struct Object *owner, |
| const char *name, |
| uint64_t size, |
| void *ptr); |
| |
| /** |
| * memory_region_init_alias: Initialize a memory region that aliases all or a |
| * part of another memory region. |
| * |
| * @mr: the #MemoryRegion to be initialized. |
| * @owner: the object that tracks the region's reference count |
| * @name: used for debugging; not visible to the user or ABI |
| * @orig: the region to be referenced; @mr will be equivalent to |
| * @orig between @offset and @offset + @size - 1. |
| * @offset: start of the section in @orig to be referenced. |
| * @size: size of the region. |
| */ |
| void memory_region_init_alias(MemoryRegion *mr, |
| struct Object *owner, |
| const char *name, |
| MemoryRegion *orig, |
| hwaddr offset, |
| uint64_t size); |
| |
| /** |
| * memory_region_init_rom: Initialize a ROM memory region. |
| * |
| * This has the same effect as calling memory_region_init_ram() |
| * and then marking the resulting region read-only with |
| * memory_region_set_readonly(). |
| * |
| * @mr: the #MemoryRegion to be initialized. |
| * @owner: the object that tracks the region's reference count |
| * @name: the name of the region. |
| * @size: size of the region. |
| * @errp: pointer to Error*, to store an error if it happens. |
| */ |
| void memory_region_init_rom(MemoryRegion *mr, |
| struct Object *owner, |
| const char *name, |
| uint64_t size, |
| Error **errp); |
| |
| /** |
| * memory_region_init_rom_device: Initialize a ROM memory region. Writes are |
| * handled via callbacks. |
| * |
| * @mr: the #MemoryRegion to be initialized. |
| * @owner: the object that tracks the region's reference count |
| * @ops: callbacks for write access handling (must not be NULL). |
| * @name: the name of the region. |
| * @size: size of the region. |
| * @errp: pointer to Error*, to store an error if it happens. |
| */ |
| void memory_region_init_rom_device(MemoryRegion *mr, |
| struct Object *owner, |
| const MemoryRegionOps *ops, |
| void *opaque, |
| const char *name, |
| uint64_t size, |
| Error **errp); |
| |
| /** |
| * memory_region_init_reservation: Initialize a memory region that reserves |
| * I/O space. |
| * |
| * A reservation region primariy serves debugging purposes. It claims I/O |
| * space that is not supposed to be handled by QEMU itself. Any access via |
| * the memory API will cause an abort(). |
| * This function is deprecated. Use memory_region_init_io() with NULL |
| * callbacks instead. |
| * |
| * @mr: the #MemoryRegion to be initialized |
| * @owner: the object that tracks the region's reference count |
| * @name: used for debugging; not visible to the user or ABI |
| * @size: size of the region. |
| */ |
| static inline void memory_region_init_reservation(MemoryRegion *mr, |
| Object *owner, |
| const char *name, |
| uint64_t size) |
| { |
| memory_region_init_io(mr, owner, NULL, mr, name, size); |
| } |
| |
| /** |
| * memory_region_init_iommu: Initialize a memory region that translates |
| * addresses |
| * |
| * An IOMMU region translates addresses and forwards accesses to a target |
| * memory region. |
| * |
| * @mr: the #MemoryRegion to be initialized |
| * @owner: the object that tracks the region's reference count |
| * @ops: a function that translates addresses into the @target region |
| * @name: used for debugging; not visible to the user or ABI |
| * @size: size of the region. |
| */ |
| void memory_region_init_iommu(MemoryRegion *mr, |
| struct Object *owner, |
| const MemoryRegionIOMMUOps *ops, |
| const char *name, |
| uint64_t size); |
| |
| /** |
| * memory_region_owner: get a memory region's owner. |
| * |
| * @mr: the memory region being queried. |
| */ |
| struct Object *memory_region_owner(MemoryRegion *mr); |
| |
| /** |
| * memory_region_size: get a memory region's size. |
| * |
| * @mr: the memory region being queried. |
| */ |
| uint64_t memory_region_size(MemoryRegion *mr); |
| |
| /** |
| * memory_region_is_ram: check whether a memory region is random access |
| * |
| * Returns %true is a memory region is random access. |
| * |
| * @mr: the memory region being queried |
| */ |
| static inline bool memory_region_is_ram(MemoryRegion *mr) |
| { |
| return mr->ram; |
| } |
| |
| /** |
| * memory_region_is_skip_dump: check whether a memory region should not be |
| * dumped |
| * |
| * Returns %true is a memory region should not be dumped(e.g. VFIO BAR MMAP). |
| * |
| * @mr: the memory region being queried |
| */ |
| bool memory_region_is_skip_dump(MemoryRegion *mr); |
| |
| /** |
| * memory_region_set_skip_dump: Set skip_dump flag, dump will ignore this memory |
| * region |
| * |
| * @mr: the memory region being queried |
| */ |
| void memory_region_set_skip_dump(MemoryRegion *mr); |
| |
| /** |
| * memory_region_is_romd: check whether a memory region is in ROMD mode |
| * |
| * Returns %true if a memory region is a ROM device and currently set to allow |
| * direct reads. |
| * |
| * @mr: the memory region being queried |
| */ |
| static inline bool memory_region_is_romd(MemoryRegion *mr) |
| { |
| return mr->rom_device && mr->romd_mode; |
| } |
| |
| /** |
| * memory_region_is_iommu: check whether a memory region is an iommu |
| * |
| * Returns %true is a memory region is an iommu. |
| * |
| * @mr: the memory region being queried |
| */ |
| static inline bool memory_region_is_iommu(MemoryRegion *mr) |
| { |
| return mr->iommu_ops; |
| } |
| |
| |
| /** |
| * memory_region_iommu_get_min_page_size: get minimum supported page size |
| * for an iommu |
| * |
| * Returns minimum supported page size for an iommu. |
| * |
| * @mr: the memory region being queried |
| */ |
| uint64_t memory_region_iommu_get_min_page_size(MemoryRegion *mr); |
| |
| /** |
| * memory_region_notify_iommu: notify a change in an IOMMU translation entry. |
| * |
| * @mr: the memory region that was changed |
| * @entry: the new entry in the IOMMU translation table. The entry |
| * replaces all old entries for the same virtual I/O address range. |
| * Deleted entries have .@perm == 0. |
| */ |
| void memory_region_notify_iommu(MemoryRegion *mr, |
| IOMMUTLBEntry entry); |
| |
| /** |
| * memory_region_register_iommu_notifier: register a notifier for changes to |
| * IOMMU translation entries. |
| * |
| * @mr: the memory region to observe |
| * @n: the notifier to be added; the notifier receives a pointer to an |
| * #IOMMUTLBEntry as the opaque value; the pointer ceases to be |
| * valid on exit from the notifier. |
| */ |
| void memory_region_register_iommu_notifier(MemoryRegion *mr, Notifier *n); |
| |
| /** |
| * memory_region_iommu_replay: replay existing IOMMU translations to |
| * a notifier with the minimum page granularity returned by |
| * mr->iommu_ops->get_page_size(). |
| * |
| * @mr: the memory region to observe |
| * @n: the notifier to which to replay iommu mappings |
| * @is_write: Whether to treat the replay as a translate "write" |
| * through the iommu |
| */ |
| void memory_region_iommu_replay(MemoryRegion *mr, Notifier *n, bool is_write); |
| |
| /** |
| * memory_region_unregister_iommu_notifier: unregister a notifier for |
| * changes to IOMMU translation entries. |
| * |
| * @mr: the memory region which was observed and for which notity_stopped() |
| * needs to be called |
| * @n: the notifier to be removed. |
| */ |
| void memory_region_unregister_iommu_notifier(MemoryRegion *mr, Notifier *n); |
| |
| /** |
| * memory_region_name: get a memory region's name |
| * |
| * Returns the string that was used to initialize the memory region. |
| * |
| * @mr: the memory region being queried |
| */ |
| const char *memory_region_name(const MemoryRegion *mr); |
| |
| /** |
| * memory_region_is_logging: return whether a memory region is logging writes |
| * |
| * Returns %true if the memory region is logging writes for the given client |
| * |
| * @mr: the memory region being queried |
| * @client: the client being queried |
| */ |
| bool memory_region_is_logging(MemoryRegion *mr, uint8_t client); |
| |
| /** |
| * memory_region_get_dirty_log_mask: return the clients for which a |
| * memory region is logging writes. |
| * |
| * Returns a bitmap of clients, in which the DIRTY_MEMORY_* constants |
| * are the bit indices. |
| * |
| * @mr: the memory region being queried |
| */ |
| uint8_t memory_region_get_dirty_log_mask(MemoryRegion *mr); |
| |
| /** |
| * memory_region_is_rom: check whether a memory region is ROM |
| * |
| * Returns %true is a memory region is read-only memory. |
| * |
| * @mr: the memory region being queried |
| */ |
| static inline bool memory_region_is_rom(MemoryRegion *mr) |
| { |
| return mr->ram && mr->readonly; |
| } |
| |
| |
| /** |
| * memory_region_get_fd: Get a file descriptor backing a RAM memory region. |
| * |
| * Returns a file descriptor backing a file-based RAM memory region, |
| * or -1 if the region is not a file-based RAM memory region. |
| * |
| * @mr: the RAM or alias memory region being queried. |
| */ |
| int memory_region_get_fd(MemoryRegion *mr); |
| |
| /** |
| * memory_region_set_fd: Mark a RAM memory region as backed by a |
| * file descriptor. |
| * |
| * This function is typically used after memory_region_init_ram_ptr(). |
| * |
| * @mr: the memory region being queried. |
| * @fd: the file descriptor that backs @mr. |
| */ |
| void memory_region_set_fd(MemoryRegion *mr, int fd); |
| |
| /** |
| * memory_region_from_host: Convert a pointer into a RAM memory region |
| * and an offset within it. |
| * |
| * Given a host pointer inside a RAM memory region (created with |
| * memory_region_init_ram() or memory_region_init_ram_ptr()), return |
| * the MemoryRegion and the offset within it. |
| * |
| * Use with care; by the time this function returns, the returned pointer is |
| * not protected by RCU anymore. If the caller is not within an RCU critical |
| * section and does not hold the iothread lock, it must have other means of |
| * protecting the pointer, such as a reference to the region that includes |
| * the incoming ram_addr_t. |
| * |
| * @mr: the memory region being queried. |
| */ |
| MemoryRegion *memory_region_from_host(void *ptr, ram_addr_t *offset); |
| |
| /** |
| * memory_region_get_ram_ptr: Get a pointer into a RAM memory region. |
| * |
| * Returns a host pointer to a RAM memory region (created with |
| * memory_region_init_ram() or memory_region_init_ram_ptr()). |
| * |
| * Use with care; by the time this function returns, the returned pointer is |
| * not protected by RCU anymore. If the caller is not within an RCU critical |
| * section and does not hold the iothread lock, it must have other means of |
| * protecting the pointer, such as a reference to the region that includes |
| * the incoming ram_addr_t. |
| * |
| * @mr: the memory region being queried. |
| */ |
| void *memory_region_get_ram_ptr(MemoryRegion *mr); |
| |
| /* memory_region_ram_resize: Resize a RAM region. |
| * |
| * Only legal before guest might have detected the memory size: e.g. on |
| * incoming migration, or right after reset. |
| * |
| * @mr: a memory region created with @memory_region_init_resizeable_ram. |
| * @newsize: the new size the region |
| * @errp: pointer to Error*, to store an error if it happens. |
| */ |
| void memory_region_ram_resize(MemoryRegion *mr, ram_addr_t newsize, |
| Error **errp); |
| |
| /** |
| * memory_region_set_log: Turn dirty logging on or off for a region. |
| * |
| * Turns dirty logging on or off for a specified client (display, migration). |
| * Only meaningful for RAM regions. |
| * |
| * @mr: the memory region being updated. |
| * @log: whether dirty logging is to be enabled or disabled. |
| * @client: the user of the logging information; %DIRTY_MEMORY_VGA only. |
| */ |
| void memory_region_set_log(MemoryRegion *mr, bool log, unsigned client); |
| |
| /** |
| * memory_region_get_dirty: Check whether a range of bytes is dirty |
| * for a specified client. |
| * |
| * Checks whether a range of bytes has been written to since the last |
| * call to memory_region_reset_dirty() with the same @client. Dirty logging |
| * must be enabled. |
| * |
| * @mr: the memory region being queried. |
| * @addr: the address (relative to the start of the region) being queried. |
| * @size: the size of the range being queried. |
| * @client: the user of the logging information; %DIRTY_MEMORY_MIGRATION or |
| * %DIRTY_MEMORY_VGA. |
| */ |
| bool memory_region_get_dirty(MemoryRegion *mr, hwaddr addr, |
| hwaddr size, unsigned client); |
| |
| /** |
| * memory_region_set_dirty: Mark a range of bytes as dirty in a memory region. |
| * |
| * Marks a range of bytes as dirty, after it has been dirtied outside |
| * guest code. |
| * |
| * @mr: the memory region being dirtied. |
| * @addr: the address (relative to the start of the region) being dirtied. |
| * @size: size of the range being dirtied. |
| */ |
| void memory_region_set_dirty(MemoryRegion *mr, hwaddr addr, |
| hwaddr size); |
| |
| /** |
| * memory_region_test_and_clear_dirty: Check whether a range of bytes is dirty |
| * for a specified client. It clears them. |
| * |
| * Checks whether a range of bytes has been written to since the last |
| * call to memory_region_reset_dirty() with the same @client. Dirty logging |
| * must be enabled. |
| * |
| * @mr: the memory region being queried. |
| * @addr: the address (relative to the start of the region) being queried. |
| * @size: the size of the range being queried. |
| * @client: the user of the logging information; %DIRTY_MEMORY_MIGRATION or |
| * %DIRTY_MEMORY_VGA. |
| */ |
| bool memory_region_test_and_clear_dirty(MemoryRegion *mr, hwaddr addr, |
| hwaddr size, unsigned client); |
| /** |
| * memory_region_sync_dirty_bitmap: Synchronize a region's dirty bitmap with |
| * any external TLBs (e.g. kvm) |
| * |
| * Flushes dirty information from accelerators such as kvm and vhost-net |
| * and makes it available to users of the memory API. |
| * |
| * @mr: the region being flushed. |
| */ |
| void memory_region_sync_dirty_bitmap(MemoryRegion *mr); |
| |
| /** |
| * memory_region_reset_dirty: Mark a range of pages as clean, for a specified |
| * client. |
| * |
| * Marks a range of pages as no longer dirty. |
| * |
| * @mr: the region being updated. |
| * @addr: the start of the subrange being cleaned. |
| * @size: the size of the subrange being cleaned. |
| * @client: the user of the logging information; %DIRTY_MEMORY_MIGRATION or |
| * %DIRTY_MEMORY_VGA. |
| */ |
| void memory_region_reset_dirty(MemoryRegion *mr, hwaddr addr, |
| hwaddr size, unsigned client); |
| |
| /** |
| * memory_region_set_readonly: Turn a memory region read-only (or read-write) |
| * |
| * Allows a memory region to be marked as read-only (turning it into a ROM). |
| * only useful on RAM regions. |
| * |
| * @mr: the region being updated. |
| * @readonly: whether rhe region is to be ROM or RAM. |
| */ |
| void memory_region_set_readonly(MemoryRegion *mr, bool readonly); |
| |
| /** |
| * memory_region_rom_device_set_romd: enable/disable ROMD mode |
| * |
| * Allows a ROM device (initialized with memory_region_init_rom_device() to |
| * set to ROMD mode (default) or MMIO mode. When it is in ROMD mode, the |
| * device is mapped to guest memory and satisfies read access directly. |
| * When in MMIO mode, reads are forwarded to the #MemoryRegion.read function. |
| * Writes are always handled by the #MemoryRegion.write function. |
| * |
| * @mr: the memory region to be updated |
| * @romd_mode: %true to put the region into ROMD mode |
| */ |
| void memory_region_rom_device_set_romd(MemoryRegion *mr, bool romd_mode); |
| |
| /** |
| * memory_region_set_coalescing: Enable memory coalescing for the region. |
| * |
| * Enabled writes to a region to be queued for later processing. MMIO ->write |
| * callbacks may be delayed until a non-coalesced MMIO is issued. |
| * Only useful for IO regions. Roughly similar to write-combining hardware. |
| * |
| * @mr: the memory region to be write coalesced |
| */ |
| void memory_region_set_coalescing(MemoryRegion *mr); |
| |
| /** |
| * memory_region_add_coalescing: Enable memory coalescing for a sub-range of |
| * a region. |
| * |
| * Like memory_region_set_coalescing(), but works on a sub-range of a region. |
| * Multiple calls can be issued coalesced disjoint ranges. |
| * |
| * @mr: the memory region to be updated. |
| * @offset: the start of the range within the region to be coalesced. |
| * @size: the size of the subrange to be coalesced. |
| */ |
| void memory_region_add_coalescing(MemoryRegion *mr, |
| hwaddr offset, |
| uint64_t size); |
| |
| /** |
| * memory_region_clear_coalescing: Disable MMIO coalescing for the region. |
| * |
| * Disables any coalescing caused by memory_region_set_coalescing() or |
| * memory_region_add_coalescing(). Roughly equivalent to uncacheble memory |
| * hardware. |
| * |
| * @mr: the memory region to be updated. |
| */ |
| void memory_region_clear_coalescing(MemoryRegion *mr); |
| |
| /** |
| * memory_region_set_flush_coalesced: Enforce memory coalescing flush before |
| * accesses. |
| * |
| * Ensure that pending coalesced MMIO request are flushed before the memory |
| * region is accessed. This property is automatically enabled for all regions |
| * passed to memory_region_set_coalescing() and memory_region_add_coalescing(). |
| * |
| * @mr: the memory region to be updated. |
| */ |
| void memory_region_set_flush_coalesced(MemoryRegion *mr); |
| |
| /** |
| * memory_region_clear_flush_coalesced: Disable memory coalescing flush before |
| * accesses. |
| * |
| * Clear the automatic coalesced MMIO flushing enabled via |
| * memory_region_set_flush_coalesced. Note that this service has no effect on |
| * memory regions that have MMIO coalescing enabled for themselves. For them, |
| * automatic flushing will stop once coalescing is disabled. |
| * |
| * @mr: the memory region to be updated. |
| */ |
| void memory_region_clear_flush_coalesced(MemoryRegion *mr); |
| |
| /** |
| * memory_region_set_global_locking: Declares the access processing requires |
| * QEMU's global lock. |
| * |
| * When this is invoked, accesses to the memory region will be processed while |
| * holding the global lock of QEMU. This is the default behavior of memory |
| * regions. |
| * |
| * @mr: the memory region to be updated. |
| */ |
| void memory_region_set_global_locking(MemoryRegion *mr); |
| |
| /** |
| * memory_region_clear_global_locking: Declares that access processing does |
| * not depend on the QEMU global lock. |
| * |
| * By clearing this property, accesses to the memory region will be processed |
| * outside of QEMU's global lock (unless the lock is held on when issuing the |
| * access request). In this case, the device model implementing the access |
| * handlers is responsible for synchronization of concurrency. |
| * |
| * @mr: the memory region to be updated. |
| */ |
| void memory_region_clear_global_locking(MemoryRegion *mr); |
| |
| /** |
| * memory_region_add_eventfd: Request an eventfd to be triggered when a word |
| * is written to a location. |
| * |
| * Marks a word in an IO region (initialized with memory_region_init_io()) |
| * as a trigger for an eventfd event. The I/O callback will not be called. |
| * The caller must be prepared to handle failure (that is, take the required |
| * action if the callback _is_ called). |
| * |
| * @mr: the memory region being updated. |
| * @addr: the address within @mr that is to be monitored |
| * @size: the size of the access to trigger the eventfd |
| * @match_data: whether to match against @data, instead of just @addr |
| * @data: the data to match against the guest write |
| * @fd: the eventfd to be triggered when @addr, @size, and @data all match. |
| **/ |
| void memory_region_add_eventfd(MemoryRegion *mr, |
| hwaddr addr, |
| unsigned size, |
| bool match_data, |
| uint64_t data, |
| EventNotifier *e); |
| |
| /** |
| * memory_region_del_eventfd: Cancel an eventfd. |
| * |
| * Cancels an eventfd trigger requested by a previous |
| * memory_region_add_eventfd() call. |
| * |
| * @mr: the memory region being updated. |
| * @addr: the address within @mr that is to be monitored |
| * @size: the size of the access to trigger the eventfd |
| * @match_data: whether to match against @data, instead of just @addr |
| * @data: the data to match against the guest write |
| * @fd: the eventfd to be triggered when @addr, @size, and @data all match. |
| */ |
| void memory_region_del_eventfd(MemoryRegion *mr, |
| hwaddr addr, |
| unsigned size, |
| bool match_data, |
| uint64_t data, |
| EventNotifier *e); |
| |
| /** |
| * memory_region_add_subregion: Add a subregion to a container. |
| * |
| * Adds a subregion at @offset. The subregion may not overlap with other |
| * subregions (except for those explicitly marked as overlapping). A region |
| * may only be added once as a subregion (unless removed with |
| * memory_region_del_subregion()); use memory_region_init_alias() if you |
| * want a region to be a subregion in multiple locations. |
| * |
| * @mr: the region to contain the new subregion; must be a container |
| * initialized with memory_region_init(). |
| * @offset: the offset relative to @mr where @subregion is added. |
| * @subregion: the subregion to be added. |
| */ |
| void memory_region_add_subregion(MemoryRegion *mr, |
| hwaddr offset, |
| MemoryRegion *subregion); |
| /** |
| * memory_region_add_subregion_overlap: Add a subregion to a container |
| * with overlap. |
| * |
| * Adds a subregion at @offset. The subregion may overlap with other |
| * subregions. Conflicts are resolved by having a higher @priority hide a |
| * lower @priority. Subregions without priority are taken as @priority 0. |
| * A region may only be added once as a subregion (unless removed with |
| * memory_region_del_subregion()); use memory_region_init_alias() if you |
| * want a region to be a subregion in multiple locations. |
| * |
| * @mr: the region to contain the new subregion; must be a container |
| * initialized with memory_region_init(). |
| * @offset: the offset relative to @mr where @subregion is added. |
| * @subregion: the subregion to be added. |
| * @priority: used for resolving overlaps; highest priority wins. |
| */ |
| void memory_region_add_subregion_overlap(MemoryRegion *mr, |
| hwaddr offset, |
| MemoryRegion *subregion, |
| int priority); |
| |
| /** |
| * memory_region_get_ram_addr: Get the ram address associated with a memory |
| * region |
| */ |
| ram_addr_t memory_region_get_ram_addr(MemoryRegion *mr); |
| |
| uint64_t memory_region_get_alignment(const MemoryRegion *mr); |
| /** |
| * memory_region_del_subregion: Remove a subregion. |
| * |
| * Removes a subregion from its container. |
| * |
| * @mr: the container to be updated. |
| * @subregion: the region being removed; must be a current subregion of @mr. |
| */ |
| void memory_region_del_subregion(MemoryRegion *mr, |
| MemoryRegion *subregion); |
| |
| /* |
| * memory_region_set_enabled: dynamically enable or disable a region |
| * |
| * Enables or disables a memory region. A disabled memory region |
| * ignores all accesses to itself and its subregions. It does not |
| * obscure sibling subregions with lower priority - it simply behaves as |
| * if it was removed from the hierarchy. |
| * |
| * Regions default to being enabled. |
| * |
| * @mr: the region to be updated |
| * @enabled: whether to enable or disable the region |
| */ |
| void memory_region_set_enabled(MemoryRegion *mr, bool enabled); |
| |
| /* |
| * memory_region_set_address: dynamically update the address of a region |
| * |
| * Dynamically updates the address of a region, relative to its container. |
| * May be used on regions are currently part of a memory hierarchy. |
| * |
| * @mr: the region to be updated |
| * @addr: new address, relative to container region |
| */ |
| void memory_region_set_address(MemoryRegion *mr, hwaddr addr); |
| |
| /* |
| * memory_region_set_size: dynamically update the size of a region. |
| * |
| * Dynamically updates the size of a region. |
| * |
| * @mr: the region to be updated |
| * @size: used size of the region. |
| */ |
| void memory_region_set_size(MemoryRegion *mr, uint64_t size); |
| |
| /* |
| * memory_region_set_alias_offset: dynamically update a memory alias's offset |
| * |
| * Dynamically updates the offset into the target region that an alias points |
| * to, as if the fourth argument to memory_region_init_alias() has changed. |
| * |
| * @mr: the #MemoryRegion to be updated; should be an alias. |
| * @offset: the new offset into the target memory region |
| */ |
| void memory_region_set_alias_offset(MemoryRegion *mr, |
| hwaddr offset); |
| |
| /** |
| * memory_region_present: checks if an address relative to a @container |
| * translates into #MemoryRegion within @container |
| * |
| * Answer whether a #MemoryRegion within @container covers the address |
| * @addr. |
| * |
| * @container: a #MemoryRegion within which @addr is a relative address |
| * @addr: the area within @container to be searched |
| */ |
| bool memory_region_present(MemoryRegion *container, hwaddr addr); |
| |
| /** |
| * memory_region_is_mapped: returns true if #MemoryRegion is mapped |
| * into any address space. |
| * |
| * @mr: a #MemoryRegion which should be checked if it's mapped |
| */ |
| bool memory_region_is_mapped(MemoryRegion *mr); |
| |
| /** |
| * memory_region_find: translate an address/size relative to a |
| * MemoryRegion into a #MemoryRegionSection. |
| * |
| * Locates the first #MemoryRegion within @mr that overlaps the range |
| * given by @addr and @size. |
| * |
| * Returns a #MemoryRegionSection that describes a contiguous overlap. |
| * It will have the following characteristics: |
| * .@size = 0 iff no overlap was found |
| * .@mr is non-%NULL iff an overlap was found |
| * |
| * Remember that in the return value the @offset_within_region is |
| * relative to the returned region (in the .@mr field), not to the |
| * @mr argument. |
| * |
| * Similarly, the .@offset_within_address_space is relative to the |
| * address space that contains both regions, the passed and the |
| * returned one. However, in the special case where the @mr argument |
| * has no container (and thus is the root of the address space), the |
| * following will hold: |
| * .@offset_within_address_space >= @addr |
| * .@offset_within_address_space + .@size <= @addr + @size |
| * |
| * @mr: a MemoryRegion within which @addr is a relative address |
| * @addr: start of the area within @as to be searched |
| * @size: size of the area to be searched |
| */ |
| MemoryRegionSection memory_region_find(MemoryRegion *mr, |
| hwaddr addr, uint64_t size); |
| |
| /** |
| * address_space_sync_dirty_bitmap: synchronize the dirty log for all memory |
| * |
| * Synchronizes the dirty page log for an entire address space. |
| * @as: the address space that contains the memory being synchronized |
| */ |
| void address_space_sync_dirty_bitmap(AddressSpace *as); |
| |
| /** |
| * memory_region_transaction_begin: Start a transaction. |
| * |
| * During a transaction, changes will be accumulated and made visible |
| * only when the transaction ends (is committed). |
| */ |
| void memory_region_transaction_begin(void); |
| |
| /** |
| * memory_region_transaction_commit: Commit a transaction and make changes |
| * visible to the guest. |
| */ |
| void memory_region_transaction_commit(void); |
| |
| /** |
| * memory_listener_register: register callbacks to be called when memory |
| * sections are mapped or unmapped into an address |
| * space |
| * |
| * @listener: an object containing the callbacks to be called |
| * @filter: if non-%NULL, only regions in this address space will be observed |
| */ |
| void memory_listener_register(MemoryListener *listener, AddressSpace *filter); |
| |
| /** |
| * memory_listener_unregister: undo the effect of memory_listener_register() |
| * |
| * @listener: an object containing the callbacks to be removed |
| */ |
| void memory_listener_unregister(MemoryListener *listener); |
| |
| /** |
| * memory_global_dirty_log_start: begin dirty logging for all regions |
| */ |
| void memory_global_dirty_log_start(void); |
| |
| /** |
| * memory_global_dirty_log_stop: end dirty logging for all regions |
| */ |
| void memory_global_dirty_log_stop(void); |
| |
| void mtree_info(fprintf_function mon_printf, void *f); |
| |
| /** |
| * memory_region_dispatch_read: perform a read directly to the specified |
| * MemoryRegion. |
| * |
| * @mr: #MemoryRegion to access |
| * @addr: address within that region |
| * @pval: pointer to uint64_t which the data is written to |
| * @size: size of the access in bytes |
| * @attrs: memory transaction attributes to use for the access |
| */ |
| MemTxResult memory_region_dispatch_read(MemoryRegion *mr, |
| hwaddr addr, |
| uint64_t *pval, |
| unsigned size, |
| MemTxAttrs attrs); |
| /** |
| * memory_region_dispatch_write: perform a write directly to the specified |
| * MemoryRegion. |
| * |
| * @mr: #MemoryRegion to access |
| * @addr: address within that region |
| * @data: data to write |
| * @size: size of the access in bytes |
| * @attrs: memory transaction attributes to use for the access |
| */ |
| MemTxResult memory_region_dispatch_write(MemoryRegion *mr, |
| hwaddr addr, |
| uint64_t data, |
| unsigned size, |
| MemTxAttrs attrs); |
| |
| /** |
| * address_space_init: initializes an address space |
| * |
| * @as: an uninitialized #AddressSpace |
| * @root: a #MemoryRegion that routes addresses for the address space |
| * @name: an address space name. The name is only used for debugging |
| * output. |
| */ |
| void address_space_init(AddressSpace *as, MemoryRegion *root, const char *name); |
| |
| /** |
| * address_space_init_shareable: return an address space for a memory region, |
| * creating it if it does not already exist |
| * |
| * @root: a #MemoryRegion that routes addresses for the address space |
| * @name: an address space name. The name is only used for debugging |
| * output. |
| * |
| * This function will return a pointer to an existing AddressSpace |
| * which was initialized with the specified MemoryRegion, or it will |
| * create and initialize one if it does not already exist. The ASes |
| * are reference-counted, so the memory will be freed automatically |
| * when the AddressSpace is destroyed via address_space_destroy. |
| */ |
| AddressSpace *address_space_init_shareable(MemoryRegion *root, |
| const char *name); |
| |
| /** |
| * address_space_destroy: destroy an address space |
| * |
| * Releases all resources associated with an address space. After an address space |
| * is destroyed, its root memory region (given by address_space_init()) may be destroyed |
| * as well. |
| * |
| * @as: address space to be destroyed |
| */ |
| void address_space_destroy(AddressSpace *as); |
| |
| /** |
| * address_space_rw: read from or write to an address space. |
| * |
| * Return a MemTxResult indicating whether the operation succeeded |
| * or failed (eg unassigned memory, device rejected the transaction, |
| * IOMMU fault). |
| * |
| * @as: #AddressSpace to be accessed |
| * @addr: address within that address space |
| * @attrs: memory transaction attributes |
| * @buf: buffer with the data transferred |
| * @is_write: indicates the transfer direction |
| */ |
| MemTxResult address_space_rw(AddressSpace *as, hwaddr addr, |
| MemTxAttrs attrs, uint8_t *buf, |
| int len, bool is_write); |
| |
| /** |
| * address_space_write: write to address space. |
| * |
| * Return a MemTxResult indicating whether the operation succeeded |
| * or failed (eg unassigned memory, device rejected the transaction, |
| * IOMMU fault). |
| * |
| * @as: #AddressSpace to be accessed |
| * @addr: address within that address space |
| * @attrs: memory transaction attributes |
| * @buf: buffer with the data transferred |
| */ |
| MemTxResult address_space_write(AddressSpace *as, hwaddr addr, |
| MemTxAttrs attrs, |
| const uint8_t *buf, int len); |
| |
| /* address_space_ld*: load from an address space |
| * address_space_st*: store to an address space |
| * |
| * These functions perform a load or store of the byte, word, |
| * longword or quad to the specified address within the AddressSpace. |
| * The _le suffixed functions treat the data as little endian; |
| * _be indicates big endian; no suffix indicates "same endianness |
| * as guest CPU". |
| * |
| * The "guest CPU endianness" accessors are deprecated for use outside |
| * target-* code; devices should be CPU-agnostic and use either the LE |
| * or the BE accessors. |
| * |
| * @as #AddressSpace to be accessed |
| * @addr: address within that address space |
| * @val: data value, for stores |
| * @attrs: memory transaction attributes |
| * @result: location to write the success/failure of the transaction; |
| * if NULL, this information is discarded |
| */ |
| uint32_t address_space_ldub(AddressSpace *as, hwaddr addr, |
| MemTxAttrs attrs, MemTxResult *result); |
| uint32_t address_space_lduw_le(AddressSpace *as, hwaddr addr, |
| MemTxAttrs attrs, MemTxResult *result); |
| uint32_t address_space_lduw_be(AddressSpace *as, hwaddr addr, |
| MemTxAttrs attrs, MemTxResult *result); |
| uint32_t address_space_ldl_le(AddressSpace *as, hwaddr addr, |
| MemTxAttrs attrs, MemTxResult *result); |
| uint32_t address_space_ldl_be(AddressSpace *as, hwaddr addr, |
| MemTxAttrs attrs, MemTxResult *result); |
| uint64_t address_space_ldq_le(AddressSpace *as, hwaddr addr, |
| MemTxAttrs attrs, MemTxResult *result); |
| uint64_t address_space_ldq_be(AddressSpace *as, hwaddr addr, |
| MemTxAttrs attrs, MemTxResult *result); |
| void address_space_stb(AddressSpace *as, hwaddr addr, uint32_t val, |
| MemTxAttrs attrs, MemTxResult *result); |
| void address_space_stw_le(AddressSpace *as, hwaddr addr, uint32_t val, |
| MemTxAttrs attrs, MemTxResult *result); |
| void address_space_stw_be(AddressSpace *as, hwaddr addr, uint32_t val, |
| MemTxAttrs attrs, MemTxResult *result); |
| void address_space_stl_le(AddressSpace *as, hwaddr addr, uint32_t val, |
| MemTxAttrs attrs, MemTxResult *result); |
| void address_space_stl_be(AddressSpace *as, hwaddr addr, uint32_t val, |
| MemTxAttrs attrs, MemTxResult *result); |
| void address_space_stq_le(AddressSpace *as, hwaddr addr, uint64_t val, |
| MemTxAttrs attrs, MemTxResult *result); |
| void address_space_stq_be(AddressSpace *as, hwaddr addr, uint64_t val, |
| MemTxAttrs attrs, MemTxResult *result); |
| |
| /* address_space_translate: translate an address range into an address space |
| * into a MemoryRegion and an address range into that section. Should be |
| * called from an RCU critical section, to avoid that the last reference |
| * to the returned region disappears after address_space_translate returns. |
| * |
| * @as: #AddressSpace to be accessed |
| * @addr: address within that address space |
| * @xlat: pointer to address within the returned memory region section's |
| * #MemoryRegion. |
| * @len: pointer to length |
| * @is_write: indicates the transfer direction |
| */ |
| MemoryRegion *address_space_translate(AddressSpace *as, hwaddr addr, |
| hwaddr *xlat, hwaddr *len, |
| bool is_write); |
| |
| /* address_space_access_valid: check for validity of accessing an address |
| * space range |
| * |
| * Check whether memory is assigned to the given address space range, and |
| * access is permitted by any IOMMU regions that are active for the address |
| * space. |
| * |
| * For now, addr and len should be aligned to a page size. This limitation |
| * will be lifted in the future. |
| * |
| * @as: #AddressSpace to be accessed |
| * @addr: address within that address space |
| * @len: length of the area to be checked |
| * @is_write: indicates the transfer direction |
| */ |
| bool address_space_access_valid(AddressSpace *as, hwaddr addr, int len, bool is_write); |
| |
| /* address_space_map: map a physical memory region into a host virtual address |
| * |
| * May map a subset of the requested range, given by and returned in @plen. |
| * May return %NULL if resources needed to perform the mapping are exhausted. |
| * Use only for reads OR writes - not for read-modify-write operations. |
| * Use cpu_register_map_client() to know when retrying the map operation is |
| * likely to succeed. |
| * |
| * @as: #AddressSpace to be accessed |
| * @addr: address within that address space |
| * @plen: pointer to length of buffer; updated on return |
| * @is_write: indicates the transfer direction |
| */ |
| void *address_space_map(AddressSpace *as, hwaddr addr, |
| hwaddr *plen, bool is_write); |
| |
| /* address_space_unmap: Unmaps a memory region previously mapped by address_space_map() |
| * |
| * Will also mark the memory as dirty if @is_write == %true. @access_len gives |
| * the amount of memory that was actually read or written by the caller. |
| * |
| * @as: #AddressSpace used |
| * @addr: address within that address space |
| * @len: buffer length as returned by address_space_map() |
| * @access_len: amount of data actually transferred |
| * @is_write: indicates the transfer direction |
| */ |
| void address_space_unmap(AddressSpace *as, void *buffer, hwaddr len, |
| int is_write, hwaddr access_len); |
| |
| |
| /* Internal functions, part of the implementation of address_space_read. */ |
| MemTxResult address_space_read_continue(AddressSpace *as, hwaddr addr, |
| MemTxAttrs attrs, uint8_t *buf, |
| int len, hwaddr addr1, hwaddr l, |
| MemoryRegion *mr); |
| MemTxResult address_space_read_full(AddressSpace *as, hwaddr addr, |
| MemTxAttrs attrs, uint8_t *buf, int len); |
| void *qemu_map_ram_ptr(RAMBlock *ram_block, ram_addr_t addr); |
| |
| static inline bool memory_access_is_direct(MemoryRegion *mr, bool is_write) |
| { |
| if (is_write) { |
| return memory_region_is_ram(mr) && !mr->readonly; |
| } else { |
| return memory_region_is_ram(mr) || memory_region_is_romd(mr); |
| } |
| } |
| |
| /** |
| * address_space_read: read from an address space. |
| * |
| * Return a MemTxResult indicating whether the operation succeeded |
| * or failed (eg unassigned memory, device rejected the transaction, |
| * IOMMU fault). |
| * |
| * @as: #AddressSpace to be accessed |
| * @addr: address within that address space |
| * @attrs: memory transaction attributes |
| * @buf: buffer with the data transferred |
| */ |
| static inline __attribute__((__always_inline__)) |
| MemTxResult address_space_read(AddressSpace *as, hwaddr addr, MemTxAttrs attrs, |
| uint8_t *buf, int len) |
| { |
| MemTxResult result = MEMTX_OK; |
| hwaddr l, addr1; |
| void *ptr; |
| MemoryRegion *mr; |
| |
| if (__builtin_constant_p(len)) { |
| if (len) { |
| rcu_read_lock(); |
| l = len; |
| mr = address_space_translate(as, addr, &addr1, &l, false); |
| if (len == l && memory_access_is_direct(mr, false)) { |
| ptr = qemu_map_ram_ptr(mr->ram_block, addr1); |
| memcpy(buf, ptr, len); |
| } else { |
| result = address_space_read_continue(as, addr, attrs, buf, len, |
| addr1, l, mr); |
| } |
| rcu_read_unlock(); |
| } |
| } else { |
| result = address_space_read_full(as, addr, attrs, buf, len); |
| } |
| return result; |
| } |
| |
| #endif |
| |
| #endif |